How do you solve Longest Word in Dictionary through Deleting on LeetCode?

Longest Word in Dictionary through Deleting (LeetCode #524) can be solved using Brute Force. The optimal approach is Brute Force with undefined time complexity and undefined space complexity. Key insight: The brute force approach checks every word in the dictionary to see if it can be formed by deleting characters from the string s. This method is straightforward but inefficient, as it involves checking each word individually.

What is the time complexity of Longest Word in Dictionary through Deleting?

The optimal solution for Longest Word in Dictionary through Deleting runs in undefined time and uses undefined space. undefined

What algorithm or data structure is used to solve Longest Word in Dictionary through Deleting?

Longest Word in Dictionary through Deleting uses the following concepts: Array, Two Pointers, String, Sorting. The recommended patterns to study are: .

#524

Longest Word in Dictionary through Deleting

Medium

ArrayTwo PointersStringSorting

LeetCode ↗

Approaches

💡

Intuition

Time Space

The brute force approach checks every word in the dictionary to see if it can be formed by deleting characters from the string s. This method is straightforward but inefficient, as it involves checking each word individually.

⚙️

Algorithm

3 steps

1Step 1: Initialize a variable to store the longest valid word found.
2Step 2: For each word in the dictionary, check if it can be formed from s by deleting characters.
3Step 3: If a word can be formed and is longer than the current longest, update the longest word. If it's the same length but lexicographically smaller, also update.

solution.py11 lines

1def can_form(word, s):
2    it = iter(s)
3    return all(char in it for char in word)
4
5def longest_word(s, dictionary):
6    longest = ""
7    for word in dictionary:
8        if can_form(word, s):
9            if (len(word) > len(longest)) or (len(word) == len(longest) and word < longest):
10                longest = word
11    return longest

Solutions and explanations are original Tejav content. Problem titles © LeetCode — use the LeetCode button above for the full problem statement.